Spring ring clasps are the next level up from simple hook & eye or toggle clasps. These roughly donut-shaped clasps are hollow metal rings cut in one place, with an inner curved wire pin, an outer trigger knob, and a hidden inner hardened steel spring assembly. Once closed around a jump ring, spring ring clasps lock in place, helping prevent accidental opening and jewelry loss. Spring rings can be difficult to open and close for some people, so a stiffer 'bar' or 'tag' with a hole in it may be easier to use than a loose jump ring. These 8mm spring ring clasps are made of high quality .925 sterling silver with a bright shiny finish, and are suitable for designs featuring medium chain or beading wire.